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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8b626dcfb8105abd5d86d62a1baeb8a36663fa6cc9ad565b1549e638e52ef4e' 
  AND token = 'f/gxc4E+rNGw55blU4tLgmL6ln+fHfVRijN6dyS27/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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