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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bad2e2d4d43a26900f2e1d536b6c0dfcb52e316ef813be2901a1ef49a0f22bc2' 
  AND token = 'LSobihUSKiji6GmPNR7PmEpFZJ+70Oyxtt7WHpETZb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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