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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cc4cab4b796a11e76c6e1150619ea7a67779717d991d20fe3ac8ab437f14f67' 
  AND token = 'Tgl29suoNluw0LqqSF6uxboJmBJ65LW5T2Q+QLC68P8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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