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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9ad2b6e03603da153367d7c73d6839876451b4a19b62670780e124733729cf0' 
  AND token = 'qqOJkXVFCOP37uJoqUEeCA1bHXvsfYyF3O1wD1tI2/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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