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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2dd59ca34716a9adf20c71bf1762ee92ddd00fbb045725844fb5c6c202785e77' 
  AND token = 's7bapaKxM9UcWFZw9FI88M08h106j8c9Itj6p79DlSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}