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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c63ea780e2c0be4a9c9f81f116c6a002e30e0975b63af0b5ad59c0e02a26a39' 
  AND token = 'lgysGCDJHI9YwZOUxc880GJHozjGLJHm7XePc7XVEAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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