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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14c29deec78e8007fbda9aad1a54e85701277d0bd4568449dd5410cd7ef31e2b' 
  AND token = 'iK2JUYz2f4Sbc8X2A+ZDcpc4lcvPPdVrP8WB2Csj0ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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