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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46bfb72b1c3f39f8b49c3dc7a22077a3cccbe683384b871eb81b1a302d18c812' 
  AND token = 'ZS+gl6j92f/b2csgM2rAiZ130RzAhhtRXX+Q3mSfiBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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