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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0e1fa43552e3d693e1ae0e296bb60e07d197209da19ffb473bea580979fd17e' 
  AND token = '5wycPeRl9PJ5Ujtxx4+lIcgr6g5dls0wd+5cDXfaOa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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