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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bafba2edc2596383db9a4968bda7fdb872e5e734528c3cb4ecad01c93fb24531' 
  AND token = 'CNtuIPnnT3G2UakakAGk1/jExQR1BQSbY/9lMsOh/xQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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