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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7de3f1548d1f3213bf9828f67f09dcd4afc3a87ae3bd9f65aebb7252a4ac29b6' 
  AND token = 'EwVNmK2iS2Hd0rPKjvc5BQmTN4N29O1iTRfJekMneOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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