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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b1eedd3a08a64d9e3dd7d742c60115c411a0d60b0bee5b8ff5f119898f5c4a9a' 
  AND token = 'FyjgyPiLFsnglRKmbOCj6H5Ti6f62qK0Nq6zfIT0mmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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