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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ec86fd9bfa767d60b5fd33c0ae085568ca70f2b95deb4eaff9a749c738d24b9' 
  AND token = 'XSp/QhSqupP3aSuww5yv2q9hUOMejPQpu5f8k0WRTlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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