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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67aaed61fd4f91b84f87b1cf46ff5f96739fff0a80f1b2edc08f5a2cda92ff3d' 
  AND token = 'oaLEtkE0wasO8vmIaPr/02FzNaHJhhifDevHCIa2zGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00114

JSON explain

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