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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e4cad49374fb0d0a9cce99df9af0b0931ad5d85b23cc104f3e33ef18da2c3fbc' 
  AND token = 'xOLu22TBmGMdFeu/BSt4fb/Y+5pJ4Zk/OCK97ulKIpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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