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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '54cec62f5bcf7c2c601cac18d3635568cb9af5d3d2d8f9213099ffa57f3841fb' 
  AND token = 'ooI0YK2BJ2snDfBp8R6si/mS4jysKyLNFpY7WQ12LL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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