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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '058fecacc94d5471c9efd86d5753957dc6d58702fee3294d53e73cca2f7a6167' 
  AND token = 'M6OcKszbMSJxahyScVyPklydXSb2X1/HAgsX9IF6DmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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