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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f55d2cdd547bc05ee444979075854d1596ce2f34e4fe8db3ff05a4ccca06a9e9' 
  AND token = 'urd9Yco/SAPUmOlEkfLiNfYPvamtRHWp+cBjizeABR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00159

JSON explain

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