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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c182cb6ea8bf678e3df7ccf6fb2e7703b5db0c8f80aa4af5b74a8d9647167bee' 
  AND token = 'cO1rwWyyXvY6RYP61A25r9Uz1I7hdyo9DbKVp7gt2pY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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