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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de4fe6440c1d87a31f7dd0b9d0bbdfa14bf4363c5b2eac85bfaf2a5c6e5977c' 
  AND token = 'mtS3G7QhyKBhkN1Enc3hICjNRM4mAdzqfFBmRRxvGlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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