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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4824219d48da61534ebef28074020a2e151535d65e06a19ba31e17dc6a67a013' 
  AND token = 'Ktdylxt6OSv85+uY2l1n5VoKA0xJ7gG29DB46gG8MXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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