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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60ed6aeafc1c6a3270b24d3c94264fec9e6efaa375b38cab841b52bc16ffc82d' 
  AND token = 'FU8E6+RQ7qFrI8iqnNEDnFyAF5vDC3eXR1JR4SeZ76w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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