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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cecbec28617dc4a7dff25e1e00c05c0806183cfc0de47f8d6d08c94bdd35a95f' 
  AND token = 'NeyLMDWdM4vGYopc1ITOSQYcXMkww3z33y1m5D1WBEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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