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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92cc421c41339d44f236b28d7f840327ecc51fcf18cde80077b4de8b577b2698' 
  AND token = 'O9R+l0zZP2jmLN1B9Zaz3HnuAt9aIpQGbmx1r6AuCQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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