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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '058bac01cd2e6404cdd4757e30074ee95292693f973f9ed023b3e7f883938e63' 
  AND token = 'Tu5Qc81A+30XBuyZ4PAOyv+FetuOJMG0yBcQF8yDVJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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