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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '044c828093705735a7f779a2c3e337559ca69f3c48a0926d5edf07144ea77030' 
  AND token = 'JzVA0S6z80h4vdlJXsfZSkBD3RqMhbDkcF4I6DPTmB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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