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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09885dc7c67770e2aac8130f97286d15b4f0212e36e41124cc3cffe0f60e917c' 
  AND token = 'KIaMQPkd4jDLCMSzVNOc+A6RzooaOJ3Qf/1qUM4jvOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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