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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cc65040a1f045a7a73f97fd45bf1247565d2447c46959c96690384f6148724e' 
  AND token = 'C1qj9M68vW/tS2nnENgCrW4sePIMGiCLJcxLX3LvIOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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