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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c7c86a5ff95b5e52a59a65a1b1963147eec0ca86aad696fa2eaebd2a0fbe25f' 
  AND token = '3ZoROle+thWX2oDUk9XrKh8TIwnq5w24ttU8aI7+3fU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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