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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd00dcce8c3b5b835251083708b05b3e9ab87f2ced986e70294a97a84b729acc6' 
  AND token = 'sJIjHsOyWc26mvV35Y/IkXHD/i/1QCA97IN8bO4GPPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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