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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '995d7b44c9d700c8da500db8c5d20def91fb508f98bc106f4b040145545a636d' 
  AND token = 'TjslgFDf4KewYgx+Ufwd7+jxY8CJ1AheiR1Tk5h1uTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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