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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c72852693ef2969776c5b9cdffaa7c8a13cd48dd011cdef5528ce787f43d16bb' 
  AND token = 'S665Jz3Rb+N/HsjSav0uMobg/e8bgcyBOuB1W69i4Hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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