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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62c22d5b55d7a4aefe60ef5baef4c2911da0f37cfcc4ab18718512fc87612e37' 
  AND token = '1Y3Plx4jU2BdP1rNr7OlG9KYUe7O2ujTKwHqb8DMLK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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