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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abf2bf9486b1785da99435314f299c232401c1df247974b4824e5b2d590751ce' 
  AND token = 'Ec8l5OiNdrz0+3olxdlTuP4wuFtRkRpPTj51oNF0/FM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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