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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6075629cb53c8acff1069b7e9490419a601906d2b5ac49f73076ba124a3d0c6' 
  AND token = 'K1mP8d1DymgWcMOLAVf7aBossO8Ef4AW3u2wFa9x/Iw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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