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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3ea9cb1b6fe27b9b3e1a8ec3aca15380a5550fd6813498e5d63acba1db45106' 
  AND token = 'vsxo16jfytq/NIKMGki2AWiJU4Hdqg40P98xrItq0ec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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