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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f4277bc4343a779058f1a5676e70e2fbb9b7d019c11ec6b166957249c7084de' 
  AND token = 'wb5U3hR1yLKZHrD2+s3gGPOR7cUJypaA7yPx/h/ZY1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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