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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58616fd0c133f8835b10ac298ee2013a0b54970110a1dac66a7513f96e59e1be' 
  AND token = 'a6ykv7FuD9NzFrVVh8qiB6PTe5fQCslCB5CLOFPhgsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00116

JSON explain

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