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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7a0290263770a901902a827dbab34bcd8c5e61edffb6804ea32b594fccf00c3' 
  AND token = 'tjr70HGIgeZiNFyxs5on12s+A0/KMVTNJAav1fjUREI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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