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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dda97235224fc7b7394f04a03850870b5785a70b10cd199852ea34fdd2929c2' 
  AND token = 'uoLdgO6hW1sMjLKk8MFLYmiqsuzqCi2JLGzyJmw9Lds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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