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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fab818758c6051f8a61af7f97c9ad4355695b34ac6e224fb57a285bb0021616' 
  AND token = '46Uain2o7BbUDNh0Jd8TKraPJ2N3IMrRMqeOPBIfsvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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