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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f027b27dbc8d60fe4cda29b164a1bd93b4bf09be93d4e98310fad8ba896e9222' 
  AND token = 'OGdrr95tsMzQBtiWxJIIhL4SzBrw7GPhtU3j+0cSiUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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