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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b62891a766f75f199d2aebc512fb77327518a8cdaabf58646ac0f2d989fa57c7' 
  AND token = '9hgVx436Ih4iU3IWd0fYm9FlfM91AsiTmvH5TG7UTH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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