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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b237c03df641c6b4389826503d944b25d80b752c4b1b50a421495da5277eb93b' 
  AND token = 'avSp1HLHQtxlbvJRC/w1aaPp61A9ZlYyPVg7q9Wc1i0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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