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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbe7fb333c085e7cf3fcbce8096a96dcb157e6a228796ff823e1a0c21fc3e799' 
  AND token = '/+QOJ8eWxfX/OdbXFxmNcAW1aYv0SfXx39E4hl/w27A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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