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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd7f865dab559d1e3b86bbb7f4eeffb8cf4554b77570324ef61bf51278b09c7f9' 
  AND token = 'VbqTCWN15CuAUaaaYpLVldrNVleJzJITEFTxnMfqfTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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