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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4402b99c4cd7a6738cf9f5b6ba3df71b69b69eebd500d669007d5a23cb0e4245' 
  AND token = 'eZLPBLj4mOdLu2fO699JVVcyLEO7kJ+yL3vGFmbvOEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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